US3131547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion engine
Assignee: Joy Manufacturing Co
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Filing: 1962-03-27
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Granted: 1964-05-05
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Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/044; F25J3/04248; F25J3/04278; F25J3/04763; F25J3/04866; F25J2200/00; F25J2200/50; F25J2240/00; F25J2240/02; F25J2270/00; F25J2270/14; F25J2270/16; F25J2270/30; F25J2270/60; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF OPERATING A MULTISTAGE EXPANSION ENGINE FOR A CRYOGENIC PROCESS COMPRISING, CONNECTING A PLURALITY OF EXPANSION CHAMBER PORTIONS OF A SINGLE CHAMBER TO THE DISCHARGE OF A COMPRESSOR, SIMULTANEOUSLY ADMITTING PRESSURE FLUID FROM SUCH COMPRESSOR DISCHARGE TO ALL OF SUCH CHAMBER PORTIONS TO MOVE A SINGLE PISTON IN ONE DIRECTION, SIMULTANEOUSLY DISCHARGING SUCH FLUID FROM SUCH CHAMBERS BY MOVING SUCH PISTON IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION.
Claim 2
Independent Claim
71 words
A METHOD OF OPERATING A MULTISTAGE EXPANSION ENGINE FOR A CRYOGENIC PROCESS COMPRISING, CONNECTING A PLURALITY OF EXPANSION CHAMBER PORTIONS OF A SINGLE CHAMBER TO THE DISCHARGE OF A COMPRESSOR, SIMULTANEOUSLY ADMITTING PRESSURE FLUID FROM SUCH COMPRESSOR DISCHARGE TO ALL OF SUCH CHAMBER PORTIONS TO MOVE A SINGLE PISTON IN ONE DIRECTION, SIMULTANEOUSLY DISCHARGING SUCH FLUID FROM SUCH CHAMBERS BY MOVING SUCH PISTON IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |